I'll see if I still have those two cores for measuring.
They were wiped out pumps, of course, tossed into the scrap metal crate and forgotten about. The scrap crate goes to the metal recycler every year or two, and that pic was form several years ago...
But, I may have absently tossed them someplace else, after I took the pics. If I've still got them, I measure. I'll bet they have even -more- crud and crap stuck to them!
Rick